Novel ultra-wideband band-pass filter based on LTCC technology

Abstract

The invention discloses a novel ultra-wideband band-pass filter based on an LTCC (Low Temperature Co-Fired Ceramic) technology, which realizes three-dimensional integration of the filter by using the LTCC technology and comprises a filter, an input port, an output port, an upper grounding plate, a lower grounding plate, a front grounding plate and a rear grounding plate, the input port with the characteristic impedance of 50 ohms is located on the left side of the filter F, and the output port with the characteristic impedance of 50 ohms is located on the right side of the filter F. The upper grounding plate is located on the upper side of the filter F, the lower grounding plate is located on the lower side of the filter F, the front grounding plate is arranged on the front side of the filter F, and the rear grounding plate is arranged on the rear side of the filter F. According to the ultra-wideband band-pass filter, out-of-band rejection is improved, the size of the filter is reduced, and the designed ultra-wideband band-pass filter has the advantages of high performance and miniaturization.

Description

technical field [0001] The invention belongs to the field of microwave technology, and in particular relates to a novel ultra-wideband band-pass filter based on LTCC technology. Background technique [0002] With the rapid development of wireless communication technology, people have higher and higher requirements for information transmission systems. While improving the utilization rate of the existing spectrum, it is hoped that a wider frequency band can be developed. Ultra-wideband technology has become a research hotspot in the field of communication due to its strong anti-interference performance, high transmission rate, extremely wide bandwidth, high spectrum utilization, large system capacity, low transmission power, and good confidentiality. As an important device in microwave / radio frequency, filters are of great significance for their high performance, low cost and miniaturization. Therefore, the research on ultra-wideband filters using ultra-wideband technology is...

AI Technical Summary

Problems solved by technology

[0003] The traditional ultra-wideband bandpass filter design method is to connect a high-pass filter and a low-pass filter to achieve the effect of a wideband bandpass filter, but this is still two filters, so that the designed filter has a volume Large, low rejection, poor passband performance, etc.

In recent years, people have begun to use parallel stubs to design ultra-wideband bandpass filters, which achieve simple structure and good passband performance, but a single stub connection makes the designed filter have low out-of-band rejection.

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